【摘要】 研制了一种适用于复合制冷系统的两级辐射制冷器。该辐冷器在194K的工作温度可以产生8.5W的冷量,制冷性能完全满足复合制冷系统的需要。详细介绍了辐冷器结构选型、热设计、结构优化设计以及热性能试验等研究工作。在热设计计算中,蒙特卡罗方法被用于计算该平面型辐冷器的辐射耦合因子,与解析法相比,相对误差小于0.4%。在结构优化设计中,非比例热容的结合数值计算的优化方法被用于该辐冷器的结构尺寸优化,通过优化,辐冷器在维持制冷性能几乎不变的前提下,结构尺寸明显减小,验证了该优化设计方法的有效性和正确性。更多还原

【Abstract】 A two stage radiant cooler applied in compound-refrigerating system(CRS) was developed.The CRS radiant cooler could provide 8.5 W cooling power in the temperature of 194 K.and the refrigeration capacity of the cooler met the requirement of compound-refrigerating system.In this paper,the processes of structure selection,thermal design,optimize design and thermal/vacuum test were described in detail.Mont Carlo method was applied in the calculation of radiant interchange factor and the calculation error was less than 0.4%.Through optimize design,the working performance of the optimized radiant cooler almost kept no change,though the structure dimensions decreased greatly.The optimize design method based on the non-scale heat theory and numerical calculation was proved to be effective.更多还原